<a href="http://github.com/angular/angular.js/edit/master/docs/content/error/injector/itkn.ngdoc" class="improve-docs btn btn-primary"><i class="icon-edit"> </i> Improve this doc</a><h1><code ng:non-bindable="">Bad Injection Token</code>
<div><span class="hint">error in component <code ng:non-bindable="">$injector</code>
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<div><pre class="minerr-errmsg" error-display="Incorrect injection token! Expected service name as string, got {0}">Incorrect injection token! Expected service name as string, got {0}</pre>
<h2 id="description">Description</h2>
<div class="description"><div class="-injector-page -injector-itkn-page"><p>This error occurs when using a bad token as a dependency injection annotation.
Dependency injection annotation tokens should always be strings. Using any other
type will cause this error to be thrown.</p>
<p>Examples of code with bad injection tokens include:</p>
<pre><code>var myCtrl = function ($scope, $http) { /* ... */ };
myCtrl.$inject = [&#39;$scope&#39;, 42];

myAppModule.controller(&#39;MyCtrl&#39;, [&#39;$scope&#39;, {}, function ($scope, $timeout) {
  // ...
}]);</code></pre>
<p>The bad injection tokens are <code>42</code> in the first example and <code>{}</code> in the second.
To avoid the error, always use string literals for dependency injection annotation
tokens.</p>
<p>For an explanation of what injection annotations are and how to use them, refer
to the <a href="guide/di">Dependency Injection Guide</a>.</p>
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